Python Programming for Beginners: Learn Coding in 7 Days: Crash Course Introduction to Programming | Hands-On Projects and Examples

120 Pages·2020·7.149 MB·English

by  John Reed

Python Programming for
Beginners
Learn Coding in 7 Days: Crash Course
Introduction to Programming | Hands-On
Projects and Examples
By John Reed
CODING ACADEMIA
© Copyright 2020 - All rights reserved.
The content contained within this book may not be reproduced, duplicated
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Under no circumstances will any blame or legal responsibility be held
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loss due to the information contained within this book. Either directly or
indirectly.
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Disclaimer Notice:
Please note the information contained within this document is for
educational and entertainment purposes only. All effort has been executed
to present accurate, up to date, and reliable, complete information. No
warranties of any kind are declared or implied. Readers acknowledge that
the author is not engaging in the rendering of legal, financial, medical or
professional advice. The content within this book has been derived from
various sources. Please consult a licensed professional before attempting
any techniques outlined in this book.
By reading this document, the reader agrees that under no circumstances is
the author responsible for any losses, direct or indirect, which are incurred
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including, but not limited to, errors, omissions, or inaccuracies.
Table of Contents
Introduction
CHAPTER 1. Setting Up your Environment
Installing Python on Windows
Installing Python on MAC OS X
Using Shell Python
CHAPTER 2. Let’s start programming
Declare Functions
Optional and Named Arguments
Write Readable Code
Documentation Strings
The Research Path of Import
Everything is and Object
What is an Object?
Indent the Code
Exceptions
Capturing Import Errors
Unbinded Variables
Everything is Case Sensitive
Run the Scripts
CHAPTER 3. Variables, expressions and instructions
Variables
Variable names and keywords
Instructions
Operators and operands
Expressions
Order of Operations
Module operator
Working with strings
Ask the user for an input value
Comments
Choose mnemonic variable names
Debug
Conditional execution
Boolean expressions
Logical operators
Conditional execution
Alternative execution
Chained Conditions
Exception handling using Try and Except
CHAPTER 4. Functions
Values returned by functions in Python
Passing parameters
Optional parameters
Functions are objects
CHAPTER 5. Loops
For Cycle
Range
While Loop
Break and Continue
for-else and while-else
CHAPTER 6. Dictionaries, List and Tuples
Dictionaries
Access the elements of a dictionary
Change the elements of a dictionary
Adding an item in a dictionary
Removing an item from a dictionary
List
Automatic generation of lists of integers
Indexing of the elements of a list
Tuples
Indexing of the elements of a tuple
Classes
Methods
Self
Initialize Instances
Attributes
Modules
Creating a form
Importing a form
Manage calls to instructions
Standard modules in Python
CHAPTER 7. Object Programming
Management of larger programs
Break down a problem - encapsulation
Our first Python object
Classes as types
Inheritance
CHAPTER 8. Error Handling
Exceptions versus Syntax Errors
Raising an Exception
The AssertionError Exception
The try and except Block: Handling Exceptions
The else Clause
Cleaning Up After Using finally
Summing Up
Conclusion
Introduction
There are many reasons why I think everyone should be able to learn to
program:
It can simplify your daily life, a common cycle for example can
be much more powerful than you imagine.
It can become a job, even if it is well paid.
It helps you to reason logically, do not underestimate this aspect,
we are always surrounded by small problems, and learning to
rationalize is a skill you can always rely on.
A computer is a very powerful and at the same time very stupid tool: a
practically infinite amount of memory when compared with our brain, a
high calculation speed and moreover is not always bored doing the same
thing (for a human being it would be instead impossible). What you have to
do to use his potential is to learn to "communicate with him", and this can
be achieved through the knowledge of programming languages.
To really learn something, you must like it. Learning to programming must
become a hobby for you, such as going for a walk or playing the guitar.
Initially you will write programs for yourself, to simplify what your current
needs are; when you get good enough you can start writing code for
someone else, and start working by programming in Python.
In the rest of this book I will teach you all the tools to become a
professional programmer. Of course it cannot be an exhaustive book, any
book is exaustive and this is even more true in programming. What I can
teach you is all the knowledge to be able to walk alone, deepen and become
an ever better programmer, and perhaps ... the best, day after day.
To start writing a program, you need an idea, or rather, a "problem". You
will need asomething that needs a solution. At that point you start writing
code, thinking about each step to get to the solution. You can start thinking
sequentially or (as I do) go backwards. Start from the end and step by step
analyze all the steps you need until you have reached the starting point.
Once this is done, all you have to do is write it in the form of a code. If you
have a little experience in other programming languages you will realize
how Python's grammar is much more intuitive. You will find yourself
writing code as if you were writing a simple sentence in English, for this
reason the learning curve will be very fast. Just like any language we will
start by writing small sentences and analyzing them, when you acquire the
necessary mastery we will start writing more and more complex programs.
Reading this book, studying it, writing codes with him is only a matter of
time before "the light will turn on". This is undoubtedly the best time, you
will begin to understand the wonderful world behind programming and you
will write codes all day because you want to learn the next step as fast as
you can, in short, the computer not obtained for you more secrets, you will
be able literally to do anything with it.
CHAPTER 1. Setting Up your
Environment
The first thing you need to do with Python is to install it.
If you are using an account on a remote server, your ISP may have already
installed Python 3. If you are using Linux at home, you may already have
Python 3 in this case too. Most popular GNU / Linux distributions include
Python 2 in the own default installation; the number of distributions that
also include Python 3 is limited, but steadily increasing. Mac OS X includes
a command line version of Python 2, but at the time of writing it does not
include Python 3. Microsoft Windows does not include any version of
Python. But don't despair! You can pave the way towards installing Python
with a mouse click, regardless of which operating system you use.
The easiest way to check if you have Python 3 on your Linux or Mac OS X
system is to use the command line. On Linux, look for a program called
Terminal in your Applications menu. (It could be in a submenu like
Accessories or System Tools.) On Mac OS X, there is an application called
Terminal.app in your / Applications / Utilities / folder.
Once you are at the command line prompt, simply type python3 (all in
lowercase, no spaces) and see what happens. On my home Linux system
Python 3 is already installed, so this command brings me into the
interactive Python shell.
mark@atlantis:~$ python3
Python 3.0.1+ (r301:69556, Apr 15 2009, 17:25:52)
[GCC 4.3.3] on linux2
Digit "help", "copyright", "credits" o "license" for further informations.
>>>
So going back to the question this section started with, "Which Python do
you need?" Whatever is already installed on the computer you have.